Update docs/content/guide/overview.ngdoc

Corrects video information

Author: csugden

docs/content/guide/overview.ngdoc

@@ -202,7 +202,6 @@ Angular frees you from the following pain:
 
 # Watch a Presentation About Angular
 
-Here is an early presentation on angular, but note that substantial development has occurred since
-the talk was given in July of 2010.
+Here is a presentation on angular from May 2012.
 
 <iframe width="560" height="315" src="http://www.youtube.com/embed/bfrn5VNpwsg" frameborder="0" allowfullscreen></iframe>